Goodbye to Dark Matter - Dr. Raj Gupta, Cosmologist, DSPod #249

Dr. Rajendra Gupta is a physics professor at the University of
Ottawa who was in the headlines a few months ago for his
assertion that the universe might be at least twice as old as we
realize. He’s back at the radical reshaping of physics with his
latest paper, which proposes that we can do away with dark matter
and dark energy. Currently, these invisible substances are
thought to make up something like 70-90% of our universe,
depending on who you ask. But they’re invisible, undetectable,
placeholders for some force or particle that can make the math
work out. As an alternative, Gupta proposes modeling the universe
with two ideas in mind. One, that the constants of nature are
not, in fact, constant and two, that the red light shift seen in
the cosmos that is considered to be a signature of expansion is
actually the fingerprint of “tired light.” Together, these
concepts allow him to recalculate the mechanics of the universe
without relying on dark matter and dark energy, which is pretty
cool. We talk about the impetus for this work, the meaning of
tired light, why expansion isn’t going away any time soon, and
the future of physics. Tell us your thoughts in the comments!!!
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Patron Chat https://bit.ly/3lcAasB Read more about Dr. Gupta's
recent papers:
https://iopscience.iop.org/article/10.3847/1538-4357/ad1bc6
https://www.uottawa.ca/about-us/media/news/new-research-suggests-our-universe-has-no-dark-matter
00:00 Go! 00:02:35 Moving the age of the universe 00:07:37
Supernovas as standard candles 00:19:16 What does it mean for the
universe to expand? 00:28:51 Is Dark Matter on the way out?
00:38:01 Variable evolution of the universe & galactic
formation 00:47:07 Where did tired light go wrong in Hoyle's day?
00:57:49 How does tired light solve the problem of galaxies in
the early universe? 01:06:46 Alternative causes of gravitational
lensing 01:16:16 Why gravity is the end all be all 01:22:59 What
causes light to be tired? 01:30:23 What's left to learn about
light? 01:37:58 Closing thoughts #sciencepodcast
#DarkMatterAlternative #TiredLightTheory #VaryingCosmicConstants
#RedefiningCosmology #RajendraGuptaPhysics
#UnconventionalUniverse #ChallengingPhysicsParadigms
#RadicalCosmologicalModels #TwistOnExpansion #ReshapingPhysics
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did his PhD at Columbia studying the elastic properties of
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